path: root/drivers/mfd/wm831x-spi.c
diff options
authorMark Brown <broonie@opensource.wolfsonmicro.com>2011-08-19 18:09:38 +0900
committerMark Brown <broonie@opensource.wolfsonmicro.com>2011-08-21 12:54:54 +0100
commitbd20eb541ebbb17a5e047cd20e74b9ccf19a4123 (patch)
tree51743ac99d54e15a5e5717db8984b29cb394047f /drivers/mfd/wm831x-spi.c
parent3566cc9d90e3f774cea47de6986c59a09090ce2b (diff)
regmap: Allow drivers to specify register defaults
It is useful for the register cache code to be able to specify the default values for the device registers. The major use is when restoring the register cache after suspend, knowing the register defaults allows us to skip registers that are at their default values when we resume which can be a substantial win on larger modern devices. For some devices (mostly older ones) the hardware does not support readback so the only way we can know the values is from code and so initializing the cache with default values makes it much easier for drivers work with read/modify/write updates. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'drivers/mfd/wm831x-spi.c')
0 files changed, 0 insertions, 0 deletions